CA2666127A1 - Method of densifying porous articles - Google Patents
Method of densifying porous articles Download PDFInfo
- Publication number
- CA2666127A1 CA2666127A1 CA002666127A CA2666127A CA2666127A1 CA 2666127 A1 CA2666127 A1 CA 2666127A1 CA 002666127 A CA002666127 A CA 002666127A CA 2666127 A CA2666127 A CA 2666127A CA 2666127 A1 CA2666127 A1 CA 2666127A1
- Authority
- CA
- Canada
- Prior art keywords
- porous substrates
- substrates
- stacks
- preform
- reaction chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 86
- 238000001564 chemical vapour infiltration Methods 0.000 claims description 26
- 239000002243 precursor Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 239000000463 material Substances 0.000 claims 1
- 238000000280 densification Methods 0.000 abstract description 17
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 19
- 229910002804 graphite Inorganic materials 0.000 description 11
- 239000010439 graphite Substances 0.000 description 11
- 238000009826 distribution Methods 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000007833 carbon precursor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63424—Polyacrylates; Polymethacrylates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/6346—Polyesters
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63488—Polyethers, e.g. alkylphenol polyglycolether, polyethylene glycol [PEG], polyethylene oxide [PEO]
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/65—Reaction sintering of free metal- or free silicon-containing compositions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/045—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/608—Green bodies or pre-forms with well-defined density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/614—Gas infiltration of green bodies or pre-forms
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/665—Local sintering, e.g. laser sintering
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Chemical Vapour Deposition (AREA)
- Formation Of Insulating Films (AREA)
- Furnace Charging Or Discharging (AREA)
- Ceramic Products (AREA)
- Braking Arrangements (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86337706P | 2006-10-29 | 2006-10-29 | |
US60/863,377 | 2006-10-29 | ||
PCT/EP2007/061429 WO2008052923A2 (en) | 2006-10-29 | 2007-10-24 | Method of densifying porous articles |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2666127A1 true CA2666127A1 (en) | 2008-05-08 |
Family
ID=39253967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002666127A Abandoned CA2666127A1 (en) | 2006-10-29 | 2007-10-24 | Method of densifying porous articles |
Country Status (14)
Country | Link |
---|---|
US (1) | US8133532B2 (ru) |
EP (1) | EP2106460B1 (ru) |
JP (1) | JP5205554B2 (ru) |
KR (1) | KR101483315B1 (ru) |
CN (1) | CN101395298B (ru) |
AU (1) | AU2007316209B2 (ru) |
BR (1) | BRPI0718635A8 (ru) |
CA (1) | CA2666127A1 (ru) |
IL (1) | IL198156A0 (ru) |
MX (1) | MX2009004529A (ru) |
RU (1) | RU2445405C2 (ru) |
TW (1) | TW200835805A (ru) |
UA (1) | UA93580C2 (ru) |
WO (1) | WO2008052923A2 (ru) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10443124B1 (en) * | 2010-09-09 | 2019-10-15 | Goodrich Corporation | Process and apparatus for making composite structures |
FR3018526B1 (fr) * | 2014-03-14 | 2021-06-11 | Herakles | Installation de densification cvi comprenant une zone de prechauffage a forte capacite |
US10407769B2 (en) | 2016-03-18 | 2019-09-10 | Goodrich Corporation | Method and apparatus for decreasing the radial temperature gradient in CVI/CVD furnaces |
US10131985B2 (en) * | 2016-03-21 | 2018-11-20 | Goodrich Corporation | System and method for enhancing a diffusion limited CVI/CVD process |
US11840040B2 (en) | 2018-02-05 | 2023-12-12 | Quintus Technologies Ab | Pressing arrangement and method of cooling article in said arrangement |
CN112979335B (zh) * | 2021-02-08 | 2022-07-01 | 哈尔滨化兴软控科技有限公司 | 氮化铝多孔隙原料的制备方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3991248A (en) * | 1972-03-28 | 1976-11-09 | Ducommun Incorporated | Fiber reinforced composite product |
FR2711645B1 (fr) * | 1993-10-27 | 1996-01-26 | Europ Propulsion | Procédé d'infiltration chimique en phase vapeur d'un matériau au sein d'un substrat fibreux avec établissement d'un gradient de température dans celui-ci. |
RU2173354C2 (ru) * | 1994-11-16 | 2001-09-10 | З Би.эФ. Гудрич Кампэни | Способ и устройство инфильтрации газовой фазы химического вещества и химического осаждения из газовой фазы (варианты), изделие, получаемое этим способом, устройство для подачи первого газа-реагента в печь для инфильтрации и осаждения из газовой фазы и фрикционный диск |
JP3754450B2 (ja) | 1994-11-16 | 2006-03-15 | グッドリッチ・コーポレイション | 圧力勾配cvi/cvd法 |
FR2733254B1 (fr) * | 1995-04-18 | 1997-07-18 | Europ Propulsion | Procede d'infiltration chimique en phase vapeur pour la densification de substrats poreux disposes en piles annulaires |
US6083560A (en) * | 1995-11-16 | 2000-07-04 | Alliant Techsystems Inc | Process for controlled deposition profile forced flow chemical vapor infiltration |
US6953605B2 (en) | 2001-12-26 | 2005-10-11 | Messier-Bugatti | Method for densifying porous substrates by chemical vapour infiltration with preheated gas |
US6572371B1 (en) * | 2002-05-06 | 2003-06-03 | Messier-Bugatti | Gas preheater and process for controlling distribution of preheated reactive gas in a CVI furnace for densification of porous annular substrates |
FR2844510B1 (fr) * | 2002-09-12 | 2006-06-16 | Snecma Propulsion Solide | Structure fibreuse tridimensionnelle en fibres refractaires, procede pour sa realisation et application aux materiaux composites thermostructuraux |
UA84862C2 (en) | 2003-03-03 | 2008-12-10 | Месье-Бугатти | Substrate |
-
2007
- 2007-10-24 WO PCT/EP2007/061429 patent/WO2008052923A2/en active Application Filing
- 2007-10-24 US US12/281,820 patent/US8133532B2/en active Active
- 2007-10-24 RU RU2009118194/02A patent/RU2445405C2/ru active
- 2007-10-24 CA CA002666127A patent/CA2666127A1/en not_active Abandoned
- 2007-10-24 CN CN2007800071363A patent/CN101395298B/zh active Active
- 2007-10-24 BR BRPI0718635A patent/BRPI0718635A8/pt not_active IP Right Cessation
- 2007-10-24 UA UAA200904209A patent/UA93580C2/ru unknown
- 2007-10-24 EP EP07821792.4A patent/EP2106460B1/en active Active
- 2007-10-24 JP JP2009533833A patent/JP5205554B2/ja not_active Expired - Fee Related
- 2007-10-24 KR KR1020097008353A patent/KR101483315B1/ko active IP Right Grant
- 2007-10-24 AU AU2007316209A patent/AU2007316209B2/en not_active Ceased
- 2007-10-24 MX MX2009004529A patent/MX2009004529A/es active IP Right Grant
- 2007-10-29 TW TW096140635A patent/TW200835805A/zh unknown
-
2009
- 2009-04-16 IL IL198156A patent/IL198156A0/en unknown
Also Published As
Publication number | Publication date |
---|---|
UA93580C2 (ru) | 2011-02-25 |
IL198156A0 (en) | 2009-12-24 |
US20090053413A1 (en) | 2009-02-26 |
US8133532B2 (en) | 2012-03-13 |
KR20090079901A (ko) | 2009-07-22 |
WO2008052923A3 (en) | 2008-08-07 |
EP2106460A2 (en) | 2009-10-07 |
MX2009004529A (es) | 2009-05-13 |
EP2106460B1 (en) | 2015-04-08 |
BRPI0718635A2 (pt) | 2015-06-23 |
CN101395298A (zh) | 2009-03-25 |
AU2007316209B2 (en) | 2012-03-15 |
KR101483315B1 (ko) | 2015-01-15 |
BRPI0718635A8 (pt) | 2015-12-29 |
AU2007316209A1 (en) | 2008-05-08 |
TW200835805A (en) | 2008-09-01 |
JP2010508223A (ja) | 2010-03-18 |
JP5205554B2 (ja) | 2013-06-05 |
CN101395298B (zh) | 2011-10-05 |
WO2008052923A2 (en) | 2008-05-08 |
RU2009118194A (ru) | 2010-12-20 |
RU2445405C2 (ru) | 2012-03-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Discontinued |
Effective date: 20141024 |